This book contains most of the papers presented at the G3 Symposium (Global and Gravity Field and Its Temporal Variations) sponsored by the International Association of Geodesy at the XXI General Assembly of the IUGG held in July 1995, Boulder, Colorado, USA. Four papers review the following areas: applications of global gravity models in geodesy and oceanography, high resolution gravity information in the oceans from satellite altimeter data, and temporal variations of the gravity field measured by terrestrial and satellite techniques. Other papers provide new results and future plans, for example, in the areas: global potental coefficient models, new terrestrial and altimeter-derived anomaly data, improved estimations Techniques, and use of GPS data in gravity field modeling.